Malicious PDF — malware analysis report

Static analysis result for SHA-256 084d988e1ebc6a47…

MALICIOUS

PDF

54.0 KB Created: 2020-08-22 13:08:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2df15932490ea465c86dd6bf413a07ab SHA-1: 0adee5c54cba7942708c6e3cc4151eeaa45c9194 SHA-256: 084d988e1ebc6a474b811d0b81d63b8e0e6708a5b1ca314be70eb2d74425db01
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many pointing to Shopify-hosted PDFs, which is indicative of a link farm. One of the primary links, 'https://ttraff.ru/pify?keyword=effective+isotropic+radiated+power+pdf', is flagged as a malicious redirector. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains the malicious URL and references to other PDF files, reinforcing the link farm and redirection attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.ru/pify?keyword=effective+isotropic+radiated+power+pdf
    • http://fedovev.realestate-stlucia.com/uploads/1/3/1/4/131405965/5500528.pdf
    • http://files.motionsong.com/uploads/1/3/0/9/130969885/wixesugodaku.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/2092/7655/files/jubekugel.pdf
    • https://cdn.shopify.com/s/files/1/0430/6377/1293/files/22468212994.pdf
    • https://cdn.shopify.com/s/files/1/0431/7046/3895/files/3887300740.pdf
    • https://cdn.shopify.com/s/files/1/0432/8390/6724/files/zudebupikasod.pdf
    • https://cdn.shopify.com/s/files/1/0434/0052/8033/files/sutudomalolakosewowuxiwep.pdf
    • https://cdn.shopify.com/s/files/1/0436/5497/1557/files/zuwudok.pdf
    • https://cdn.shopify.com/s/files/1/0437/7070/8125/files/39033723866.pdf
    • https://cdn.shopify.com/s/files/1/0434/5180/9957/files/renal_tubular_acidosis_guidelines.pdf
    • https://cdn.shopify.com/s/files/1/0430/6462/3265/files/wivukejupogo.pdf
    • https://cdn.shopify.com/s/files/1/0428/1263/7351/files/banking_regulation_act_updated.pdf
    • https://cdn.shopify.com/s/files/1/0433/8375/0814/files/41754116578.pdf
    • https://cdn.shopify.com/s/files/1/0431/7154/5237/files/xowilijebatelowog.pdf
    • https://cdn.shopify.com/s/files/1/0431/2599/7722/files/nodazatipok.pdf
    • https://cdn.shopify.com/s/files/1/0431/1253/0081/files/kinesics_communication.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008000.bin
1d474f6aa03fa4930d98b904de80e4c904e51331011127c8a299f56243408296		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8000 5224 bytes
font_01_sfnt_off000091f3.bin
3e0ad821d078d4a13377d1437ee1c5da592902eed7052976b882c562f4808369		 pdf-font-stream PDF embedded font (sfnt) at offset 0x91F3 10516 bytes
font_02_sfnt_off0000b623.bin
a12e1470c7ae925daad548a12934703a3a60fb09a822252cc73ba90359afbd61		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB623 16064 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.